18477395380 has 48 divisors (see below), whose sum is σ = 39765703824. Its totient is φ = 7207649280.

The previous prime is 18477395357. The next prime is 18477395383. The reversal of 18477395380 is 8359377481.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9738137124 + 8739258256 = 98682^2 + 93484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18477395383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3698164 + ... + 3703156.

It is an arithmetic number, because the mean of its divisors is an integer number (828452163).

Almost surely, 2^18477395380 is an apocalyptic number.

18477395380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18477395380 is an abundant number, since it is smaller than the sum of its proper divisors (21288308444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18477395380 is a wasteful number, since it uses less digits than its factorization.

18477395380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9556 (or 9554 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 18477395380 in words is "eighteen billion, four hundred seventy-seven million, three hundred ninety-five thousand, three hundred eighty".